On which Beatles songs did Ringo sing?

With A Little Help From My Friends

Act Naturally, Honey Don't, What Goes On, Yellow Submarine, Don't Pass Me By and Octopus's Garden all feature Ringo on lead vocal.

He also did lead vocals for 'Matchbox', featured on the EP 'Long Tall Sally'

Please Please Me - Boys
With the Beatles - I Wanna Be Your Man
Beatles for Sale - Honey Don't
Help - Act Naturally
Rubber Soul - What Goes On
Revolver - Yellow Submarine
Sgt. Pepper's - With a Little Help from My Friends
The Beatles (white album) - Don't Pass Me By, Good Night
Abbey Road - Octopus's garden
He did not take lead vocals on any tracks on A Hard Day's Night and Let It Be.

https://www.quora.com/What-Beatles-songs-did-Ringo-sing

Carry That Weight
Christmas Time (Is Here Again)
Shout
Act Naturally
Don't Pass Me By
Good Night
Honey Don't
I Wanna Be Your Man
If You've Got Trouble
Octopus's Garden
What Goes On
With A Little Help From My Friends
Yellow Submarine
Boys
Matchbox

Ringo also sang lead vocals on 'Helter Skelter' (from Let It Be) and also on 'She Loves You' (duet with John Lennon, on Abbey Road). Little known fact.

Helter Skelter isn't on Let It Be, it's on The Beatles (known as the White Album) and the lead vocal is Paul McCartney.
"According to Chris Thomas, who was present,[14] the 18 July session was especially spirited. "While Paul was doing his vocal, George Harrison had set fire to an ashtray and was running around the studio with it above his head, doing an Arthur Brown." ....Ian MacDonald was critical, calling it "ridiculous, McCartney shrieking weedily against a massively tape-echoed backdrop of out-of-tune thrashing."[17] Alan W. Pollack ... noted "Paul's savage vocal delivery" as reinforcing this theme."
https://en.wikipedia.org/wiki/Helter_Skelter_(song)